Terminal structure for electric batteries



T. R. COOK. v TERMINAL STRUCTURE FOR ELECTRIC BATTERIES.

APPLICATION EILE D M NT. 10' 1920. I

Patented Mar. 22, 1921.

INVENTOR BY H A I TTORNEYLJ till he l it.

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Application filed .llllareh '10, wet.

I! '0 all whom may concern Be it known that .l, Clitoniie l t. Goon, a citizen of the United States, residing llittelnirgh in the county of l llleg'heny and State of Pennsylvania, have invented certain new and useful improvements in llerininal titructures; for Electric Batteries, of which the following; is a specification.

lily invention relates to electric batteries, and particularly to terminal structures for such batteries. The invention vis particularly Well adapted for, though not limiteil' to, batteries of the secondary or storage type.

One object of. my invention is the provision ot an improved means for preventing the escape of the battery liquid at the 'ter; nnnal.

T will describe one form of terminal structure eembodying; my invention, and Will then point out the novel features thereof in.

claims.

The accompanying drawing is a view showing in vertical section one form ol? terminal structure embodying my invention.

ltet'erringto the drawing, the reference character l designates the cover of a battery cell, which cover is provided with a de pending socket l and an 11 standing llange 1". Extending through the socket and flange is a round aperture 2 at the bottom of which is an internal flange 3. Passing through the aperture 2 is a terminal post t, the lower end of which is attached in suitable manner to one of the sets olt battery plates 5. it will be observed that there is an appreciable amount of clearance between v the post 4: and the flange 3.

tileeved on the post 4 is a metallic ring 6 which rests against the flange 3. liurromulingr the post above this ring is a gasket 7 of suitable n'iaterial such as soft rubber, and above the gasket isa second metallic ring 8. The external diameter oi" each ring and the gasket is such that these parts; lit in the aperture 2 with little or no clearance, but that they may be readily inserted therein and removed therefrom. The upper ring 8 is preferably located Within the flange '1" flu shown. V

The outer surface of flange 1 is threaded to receive a follower out 9, which nutis provided With an internal flange 9 arranged to engage the upper ring 8.- it will be seen flpeeifioation of Letters Patent,

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that by screwing: the follower 9 dmvnwardly on the flange ]."l the ring 8 will be driven downwardly, thereby compressing the gashet between this ring and the lower ring ti. The result .o'l. this compreseion is to term the gasket Y into engagement with theipoet l and the wall of the apertiiire with a lion siderable aiuoiint of pressure thereby e'l ectively proventing the eec 1' of battery liquid tlirougl'i the aperture 2. I

he 'liunction of the lower ring; to tire ent the gasket 7 from being forced tlirc'iuggh he annular space between the poet at and the flange 3.

To assemble the StI'HCll-iitt), the ring; ll gasket 7 and ring ti are olaced on the post (t in the order named, and the follower 9 then screwed downwardly until the de sired pressure on the tg'tihllii l ll is attained. The gasket i may be renewed by merely removing); the follower 9 and the ring El, and it will be noted that this renewal does not result in the damage to any part of the structure,

Although it have herein shown and de scribed only one 'lornl ot terminal structure embodying my invei'ition, it is u'i'iderstood that various changes and niodili rations may be made therein within ti a scope ot the appendedclaims without departing trout the spirit and scope of my invention.

' Having thus described my invent on, What it claim in: i

1. ln an electric battery, a cell cover hill/'2 ing an aperture provided with an internal flange, a terminal post passing; through said aperture, a ring: of rigid material sleevol on said post and resting on said llane'e, an an nular gasket sleeved on Said post above said ring, a second ring, o'fi rigid material sleeved on said post above said ,egaslnet and means cooperating: with said cell cover for forcing nulaigasket sleeved on said post above said ring, a second ring of rigid material sleeved on said post ahove said gasket an annular projection on 3 upper surface 0t said cell cover concentric with said. aperture and proill let

vided with screw threads on its outer surface, and a follower screwed on said projection to drive said second ring downwardly so that the gasket is compressed between said two rings.

3. In an electric battery, a cell cover having an aperture provided with an internal flange, a terminal post passing through said aperture with clearance between the post and said flange, a ring of rigid material sleeved on said post and resting on said flange, an annular gasket sleeved on said post above said ring, a second ring of rigid material sleeved on said post above said "gasket, the external diameters of said gasket and rings being substantiallw the same as the diameter of said aperture, and means eooperating With said cell cover for forcing said second ring downwardly so that the gasket is compressed between said two rings.

4. in an electric battery, a cell cover having an aperture provided with an internal flange, a terminal post passing through said aperture, a ring of comparatively rigid material sleeved on said post and resting on said flange, an annular gasket of readily compressible material such as soft rubber sleeved on said post above said ring, a second ring similar to the first and sleeved on said post above said gasket, and means cooperating with said cell cover for forcing said second ring downwm-dly so that said gasket is compressed between the two rings.

In testimony whereof I aiiix my signature.

THOMAS ll. COOK. 

